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[Andrew <1283953@xxxxxxxxxxxxxxxxxx>]

That is very odd: After uninstallation of the mainline kernel and reboot
the brighness keys keep working (till first sleep though).

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https://bugs.launchpad.net/bugs/1283953

Title:
  [IdeaPad S205 Notebook] Brightness keys do not work anymore

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  The brightess conrol key do not work right on kernel update 3.2.0-58
  -> 3.2.0-59. The dialog does not pop up, and the brightness is not
  being changed. It worked with previous kernel 3.2.0-58, at least till
  first system sleep (closing the laptop).

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-59-generic 3.2.0-59.90
  ProcVersionSignature: Ubuntu 3.2.0-59.90-generic 3.2.54
  Uname: Linux 3.2.0-59-generic i686
  NonfreeKernelModules: fglrx
  .etc.asound.conf:
   defaults.ctl.card 1
   defaults.pcm.card 1
   defaults.timer.card 1
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu17.6
  Architecture: i386
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 1: SB [HDA ATI SB], device 0: CONEXANT Analog [CONEXANT Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  andrew     1749 F.... lxpanel
  Card0.Amixer.info:
   Card hw:0 'Generic'/'HD-Audio Generic at 0x90244000 irq 43'
     Mixer name	: 'ATI R6xx HDMI'
     Components	: 'HDA:1002aa01,00aa0100,00100200'
     Controls      : 6
     Simple ctrls  : 1
  Card0.Amixer.values:
   Simple mixer control 'IEC958',0
     Capabilities: pswitch pswitch-joined penum
     Playback channels: Mono
     Mono: Playback [off]
  Card1.Amixer.info:
   Card hw:1 'SB'/'HDA ATI SB at 0x90240000 irq 16'
     Mixer name	: 'Conexant CX20590'
     Components	: 'HDA:14f1506e,17aa6005,00100003'
     Controls      : 9
     Simple ctrls  : 6
  Date: Mon Feb 24 08:48:35 2014
  HibernationDevice: RESUME=UUID=61f0b28a-c480-44b1-986c-b4ef7beacbe8
  InstallationMedia: Lubuntu 12.04 "Precise Pangolin" - Release i386 (20120423)
  MachineType: LENOVO Brazos
  MarkForUpload: True
  ProcEnviron:
   LANGUAGE=ru_RU:ru
   TERM=xterm
   PATH=(custom, no user)
   LANG=ru_RU.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-59-generic root=UUID=ac66b454-53c5-4cbf-a577-ae4ea09be832 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-59-generic N/A
   linux-backports-modules-3.2.0-59-generic  N/A
   linux-firmware                            1.79.9
  SourcePackage: linux
  StagingDrivers: rts5139
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/10/2011
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 4BCN24WW
  dmi.board.asset.tag: Base Board Asset Tag Unknown
  dmi.board.name: Inagua
  dmi.board.vendor: LENOVO
  dmi.board.version: 109-B78210-00A
  dmi.chassis.asset.tag: Chassis Asset Tag Unknown
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Chassis Version Unknown
  dmi.modalias: dmi:bvnLENOVO:bvr4BCN24WW:bd08/10/2011:svnLENOVO:pnBrazos:pvrIdeapadS205:rvnLENOVO:rnInagua:rvr109-B78210-00A:cvnLENOVO:ct10:cvrChassisVersionUnknown:
  dmi.product.name: Brazos
  dmi.product.version: Ideapad S205
  dmi.sys.vendor: LENOVO

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